Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Roger Ericksen's mindat.org home page

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Roger Ericksen's mindat.org home page

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Registered member since 26th Oct 2011

Roger Ericksen has uploaded:
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I had a strong interest in rocks and minerals from childhood. A family move from New York City to Peekskill N.Y. just fueled its momentum. Meeting Peter Zodac and getting some mineral ID help at age 12, along with free old copies R&M magazine did't hurt either.

 
 
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